论文部分内容阅读
据报导,某些病害是由于病原菌产生某种致病物质而干扰寄主正常生化功能,导致植株发病直至死亡。例如玉米小斑病(H.maydis)病原产生一种蛋白质类毒素与寄主线粒体膜结合,发生解偶联氧化磷酸化作用。鲁道夫(1976)曾经列举八十三种真菌和十九种细菌证明它们含有致病毒素。国外已应用提取的致病物质(或人工合成类似物)通过实验室愈伤组织培养技术,进行测定并连续筛选出抗病的愈伤组织(或细胞)而再生成为抗病植株。B.G.Gengenbuch和C.E.Green(1975)已成功地通过H.maydis的T型小种产生致病毒素对愈伤组织进行连
It is reported that some diseases are due to pathogenic bacteria produce certain pathogenic substances interfere with the normal biochemical function of the host, leading to plant disease until death. For example, the pathogen H. maydis produces a protein-like toxin that binds to the host mitochondrial membrane and undergoes uncoupled oxidative phosphorylation. Rudolph (1976) once cited 83 fungi and 19 bacteria that proved to contain the toxin. Abroad has been applied to extract the pathogenic substances (or synthetic analogues) by laboratory callus culture techniques, determination and continuous screening of disease-resistant callus (or cells) and regenerate into disease-resistant plants. B.G. Gengenbuch and C.E. Green (1975) have succeeded in producing the callus by the pathogenic small toxin strain H. maydis